Species profile: Athripsodes commutatus

September 27, 2016

Athripsodes commutatus (Rostock, 1874)

Athripsodes commutatus is one of 24 members of the Family Leptoceridae found in Ireland, and one of five members of the genus Athripsodes. It is a species whose larvae can be found in rivers and large streams, on a substratum of coarse gravel to cobbles, rocks and bedrock, in moderate to high current velocities. Athripsodes commutatus has a curved case made of sand grains. The species has no preference in terms of water pH.

In temperate areas, Athripsodes commutatus has a univoltine (one generation per year) reproductive cycle, and lives for up to one year.

Defining features of the larvae of Athripsodes commutatus include a mesonotum with dark, curved posterior-lateral projections, mandibles no more than twice as long as wide, a triangular ventral apotome, no dagger-shaped setae on the anterior face of the 3rd leg trochanter and femur, the ventral edge of the tibia of the 1st leg with only a single strong setae at the distal corner, a pale gap in the dark posterior ridge of the head capsule made by a subocular ecdysial line, dark shape on the labrum enveloping the median pit, and ventral apotome with a rounded apex. For other detailed features that separate the species from Athripsodes albifrons, see Wallace et al. (2003).

The adults of Athripsodes commutatus can be found on the wing from June to September.

For details of records of Athripsodes commutatus, visit the National Biodiversity Data Centre page here.

References

Barnard, P. and Ross, E. (2012) The Adult Trichoptera (Caddisflies) of Britain and Ireland. RES Handbook Volume 1, Part 17.

Graf, W., Murphy, J., Dahl, J., Zamora-Muñoz, C. and López-Rodríguez, M.J. (2008) Distribution and Ecological Preferences of European Freshwater Species. Volume 1: Trichoptera. Astrid Schmidt-Kloiber & Daniel Hering (eds). Pensoft, Sofia-Moscow.

O’Connor, J.P. (2015) A Catalogue and Atlas of the Caddisflies (Trichoptera) of Ireland. Occasional Publication of the Irish Biogeographical Society, No. 11.

Wallace, I.D., Wallace, B. and Philipson, G.N. (2003) Keys to the Case-bearing Caddis Larvae of Britain and Ireland. Scientific Publication of the Freshwater Biological Association No. 61.

Last updated: 29/09/2016

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